ID   IP21_CAPAN              Reviewed;          55 AA.
AC   P56615;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-1998, sequence version 1.
DT   25-MAY-2022, entry version 59.
DE   RecName: Full=Proteinase inhibitor PSI-1.1;
OS   Capsicum annuum (Capsicum pepper).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Solanaceae; Solanoideae; Capsiceae; Capsicum.
OX   NCBI_TaxID=4072;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Seed;
RX   PubMed=8948493; DOI=10.1016/s0167-4838(96)00121-5;
RA   Antcheva N., Patthy A., Athanasiadis A., Tchorbanov B., Zakhariev S.,
RA   Pongor S.;
RT   "Primary structure and specificity of a serine proteinase inhibitor from
RT   paprika (Capsicum annuum) seeds.";
RL   Biochim. Biophys. Acta 1298:95-101(1996).
RN   [2]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Seed;
RA   Antcheva N., Patthy A., Athanasiadis A., Tchorbanov B., Zakhariev S.,
RA   Pongor S.;
RT   "Isolation and characterization of a major serine proteinase inhibitor from
RT   paprika (Capsicum annuum) seeds.";
RL   (In) Ramage R., Epton R. (eds.);
RL   Peptides 1996, pp.209-210, Mayflower Scientific, Kingswinford (1996).
CC   -!- FUNCTION: Potent inhibitor of trypsin and a weaker inhibitor of
CC       chymotrypsin and pronase E.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- SIMILARITY: Belongs to the protease inhibitor I20 (potato type II
CC       proteinase inhibitor) family. {ECO:0000305}.
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DR   AlphaFoldDB; P56615; -.
DR   SMR; P56615; -.
DR   Proteomes; UP000189700; Genome assembly.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0004867; F:serine-type endopeptidase inhibitor activity; IEA:UniProtKB-KW.
DR   InterPro; IPR003465; Prot_inh_I20.
DR   Pfam; PF02428; Prot_inhib_II; 2.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Protease inhibitor; Secreted;
KW   Serine protease inhibitor.
FT   CHAIN           1..55
FT                   /note="Proteinase inhibitor PSI-1.1"
FT                   /id="PRO_0000217671"
FT   SITE            38..39
FT                   /note="Reactive bond for trypsin"
FT                   /evidence="ECO:0000255"
FT   DISULFID        3..40
FT   DISULFID        6..24
FT   DISULFID        7..36
FT   DISULFID        13..49
SQ   SEQUENCE   55 AA;  6061 MW;  E401FF2DB8F3CE08 CRC64;
     RICTNCCAGR KGCNYYSADG TFICEGESDP NNPKACPRYC DTRIAYSKCP RSEGN